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Nov 20th, 2008

Linked List of struct

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I am creating a linked list which links a struct of data together. However, this is my problem, if I declare struct Node first then the Event type wont exist, but if I declare struct Event first then nodePtr wont exist....im kinda stuck here as to how I should declare them.

C++ Syntax (Toggle Plain Text)
struct Event
{
       void addEvent();
 
       tm startTime, endTime;
       string eventItem;
       string eventNotes;
       char allDay;
       nodePtr head, tail;
 
};
 
 
struct Node
{
       Event eventNode;
       Node *next;
};
 
typedef Node* nodePtr;
struct Event
{
       void addEvent();
       
       tm startTime, endTime;
       string eventItem;
       string eventNotes;
       char allDay;
       nodePtr head, tail;
                     
};


struct Node
{
       Event eventNode;
       Node *next;
};

typedef Node* nodePtr;

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number87

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Nov 20th, 2008

Re: Linked List of struct

Not sure of what you want to accomplish here. This piece of info might help getting the same results using a different method.

emotionalone

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Nov 20th, 2008

Re: Linked List of struct

ok what im trying to do have a list of Events (which are actually a struct type containning data such as time date etc). And my problem as can be seen above is that I do not know how to resolve their declarations. I cant declare struct Event first because it contains pointers to the next Event struct. And I cant declare struct Node first because the node is of Event type.

number87

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Nov 21st, 2008

Re: Linked List of struct

c++ Syntax (Toggle Plain Text)
struct Event
{
       void addEvent();
 
       tm startTime, endTime;
       string eventItem;
       string eventNotes;
       char allDay;
       nodePtr *head, *tail; //-- a pointer!, maybe...
 
};
 
 
struct Node
{
       Event *eventNode; //-- a pointer!, maybe.
       Node *next;
};
 
typedef Node* nodePtr;
struct Event
{
       void addEvent();
       
       tm startTime, endTime;
       string eventItem;
       string eventNotes;
       char allDay;
       nodePtr *head, *tail; //-- a pointer!, maybe...
                     
};


struct Node
{
       Event *eventNode; //-- a pointer!, maybe.
       Node *next;
};

typedef Node* nodePtr;

cikara21

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Solved Threads: 69

Posting Whiz

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340 posts
since Jul 2008

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Nov 21st, 2008

Re: Linked List of struct

Maybe, you confused the functionality of Event struct and Node struct.

There are two ways to reach you objective.
First,

C++ Syntax (Toggle Plain Text)
struct EventNode
{
  tm startTime, endTime;
  string eventItem;
  string eventNotes;
  char allDay;
 
  EventNode* next;
};
 
struct EventList
{
  void addEvent();
  ... // other member functions used to sustain the list 
private:
  EventNode* head;
  EventNode* tail;
};
struct EventNode
{
  tm startTime, endTime;
  string eventItem;
  string eventNotes;
  char allDay;
  
  EventNode* next;
};

struct EventList
{
  void addEvent();
  ... // other member functions used to sustain the list 
private:
  EventNode* head;
  EventNode* tail;
};

another way use the list of STL to store the event.

C++ Syntax (Toggle Plain Text)
struct Event
{
  tm startTime, endTime;
  string eventItem;
  string eventNotes;
  char allDay;
};
 
std::list<Event> eventList;
struct Event
{
  tm startTime, endTime;
  string eventItem;
  string eventNotes;
  char allDay;
};

std::list<Event> eventList;

littlestone

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Nov 21st, 2008

Re: Linked List of struct

ah ok i get what u mean

number87

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